Patient characteristics, overall and stratified by type of AIDS-defining event*; entries are n (%) unless otherwise stated.

*As patients may have experienced more than one of the specific AIDS-defining events, each event is treated as a separate binary covariate.**Included the following events: oesophageal candidiasis (n = 75); toxoplasmosis (n = 50); cytomegalovirus (n = 36); cryptococcal meningitis (n = 19); cryptosporidiosis (n = 8); progressive multifocal leukoencephalopathy (n = 18), herpes simplex infections (n = 10).***Based on patients with sufficient follow-up to be categorized into one of the two groups (see Methods).§A small number of patients developed AIDS-defining conditions or died that did not fall into one of the five specific categories (e.g. wasting syndrome) – these patients are included in the total column but will not be in the subcolumns.